Ответ:
Объяснение:
(4-y)²-y(y+1) = 16-8y+y²-y²+y = 16-9y = 16+1 = 17
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Ответ:
Объяснение:
(4-y)²-y(y+1) = 16-8y+y²-y²+y = 16-9y = 16+1 = 17